Explosive.



, UNITED STAT s PATENT OFFICE.

JOSEPH SAYER S, WALTER ATKINSON WILSON, AND

JAMES THORBU'BN, tor AitbEE-R,

SCOTLAND, ASSIGNORS T0 E. I. no PON'I DE EMOURS POWDERGOMLr-AEIWY,- onfiwrn MINGTON, DELAWARE, A CORPORATION OF NEW JERSEY.

EXPLOSIVE.

tion filed April 26, 1911.

To all whom it may concern:

Be ,it known that we, JOSEPH Sxi nns, IWA'LTER ATKINSON VVILSON, and JAMES Timnnmm, sub ects of the Klng of Great Bri'tain, residing at Ardeer, Ayrshire, Scotland, have invented a new and useful Improvement in Explosives, of which the following is a full, clear, and exact descrip tion.

' It-is well known that the freezing point of "intro-glycerin can be lowered within certain limits by dissolving therein one or more nitro bodies, such, for instance, as di-nitrotoluol, tri-nitro-toluol', etc.,and various atteinpts have already beenmade to utilize this property in the roductionof explosives which will not be iable'to freeze at low temperatures. As appears from patent literature, it has also been proposed, in preparing various explosive mixtures, to incororate with these ingredients suitable oxiiz ing a ents and in certain cases also suitable combustibles of which wood-meal is one of those recommended. Starting from'this stand oint, we have aimed at incor orating in a blasting explosive a suflicienty large proportion of nitro bodies soluble in nitroglycerin to secure the desired result without rendering the explosive too insensible to det-' onation, and have adjusted the proportions of the other ingredients present, particularly of the oxidizing agent, 6. 9.,perchlorate of potash, and ofthe combustible, e. g., wood-- mixed with an oxidizing agent such as perchlorate of potassium or ofsodium or of ammonium or a mixture. of such perchlorates, or in lieu of or as well as the perchlorate or perchlorates, one or more of the cor- Specification of Letters Patent. Ho Drawing. Original application filed November 15, 1910, Serial No. 592,535. Divided and this applicawhlch remain substantially undi-- wan.

Patented Jam; 13,.1911.

Serial No. 623,447.

responding nitrates, or clrloa a t V combustible which is also absorbentsu 'f instance as wood-meaLn-zflourr,:branw-br-rthe like, with or without the' additionuof;graph ite, magnesium carbonate,-challt orathe like.

The proportions of the aforesaitlmingi edis ents which we have-found to be-mostsuitable are as follows:

(1 N 1troglycer1n Nitro-cotton ;i Mono-nitro-naphthalen Di-nitro-toluol Tri-nitro -toluql Potassium perchild" te VVoodqmeal (dry);

N itro-glycerin 18. 89 Nitro-cotton 1. 27 Mono-nitro-naphthalene 0. 87 Di-nitro-toluol- 2. 6O Tri-nitro-toluol 4. 62 7 ,Potassium perchlo1'ate 58. 75 W cod-meal 9. 51 Magnesium carbonate 0. 50 Graphite 2. 99

Nitro-glycerln 17. 20 Nitro-cotton 1. 34 Mono-nitro-naphthalene 1. 20 Di'nitro-toluol i 3. 59 Tri-nitro-toluol 6. 37 Potassium chlorate; 60. 30 Wood-meal .10. O0

N itro-glycerm 16. 00 .Nitro-cotton. 1. 24 M0no-nitro-.naphthalene 1. 10 Di-nitro-toluol 3. 34-. Tri-nitro-toluol 5. 92 Ammonium nitrate 69. 90 Wood-meal '2. 50

- amp'les' should .not

Nitro-glycerin -i; 15.80

- Mono-nitro-naphthalene 1. 10 Di-nitro-toluoL, 3.80 Tri-nitro-toluol 5. 80 Potassium nitrate 41. 00

- Wood-meal. 32. 00 Chalk, .50

van in the above exmaterially departed from, as the sucoesslobtained with our explosives is consequential upon the selection of the proper proportions.

To prevent misunderstanding it maybe The proportions explained that the proportions of all the in-- 'gredients enumerated in the various examp'lesgiv'en are applicable only for the par ticular example, a, 9;,

the proportion of wood-meal in".example whichap roximates'to-Itheproportion ofwood-mea used in -known "explosivespf -a difierent character-holds good only for that fiepar ticular example.

. set forth in the examples, with the exception We do not herein claim the compounds of the. hereinafter claimed compound, as

such other compounds .-fo rm the subject matterv of "separate applications.-

is application is a division. of a plicat-1on Senal No. 592,535, filed Novem er 15, 1910.

We do not claim in this application-the proportions-of the com ositions set out here- 111 under the headings 1) (2) (4) and (5) as the same" are claimed in a plications Serial No. 592,535, filed Novem er 15 1910 and Serial Nos. 623,446, 623,448 and 623,449, filed A ril 26, 1911.

Having now ully described our invention, what we claim and desire to protect by Let ters Patent is:

' An explosive compound comprising nitroglycerin 17.20 per cent, Intro-cotton 1.34

per cent-., mono-nitro-naphthalene 1.20per' cent, di-nitro-toluol 3.59 per cent, tri-nit'ro toluol 6.37 per cent, potassium chlorate 60.30

per cent, and wood meal 10,00per cent.

In testimony of which invention, we have hereunto set our hands, respectively at GlaS.-

gow, Scotland, and Nanaima, Canada, on this 15th day of Feby. and 20th day of March, 1911.

JOSEPH SAYERS. WALTER ATKINSON WILSON. JAMES THORBURN, 'Witness'es: I I

'Jorm MoCLEAmq Tnomlk's Bisnor GRAHAM- 

